x86/smp: Remove pointless wmb()s from native_stop_other_cpus()

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commit 2affa6d6db upstream.

The wmb()s before sending the IPIs are not synchronizing anything.

If at all then the apic IPI functions have to provide or act as appropriate
barriers.

Remove these cargo cult barriers which have no explanation of what they are
synchronizing.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230615193330.378358382@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thomas Gleixner 2023-06-15 22:33:54 +02:00 • committed by Greg Kroah-Hartman

parent 8b1b43c421

commit 4726d74f69

1 changed files with 0 additions and 6 deletions

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arch/x86/kernel/smp.c

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